Top 20 Alternatives to SvelteKit UI in UI & UX Prototyping Software

SvelteKit UI is a component library for building SvelteKit applications. If you’re looking for UI/UX prototyping tools that let you design, prototype, and collaborate without writing code, the following 20 solutions are strong alternatives.

Featured Offers
Top Competitors to Consider
#2 Figma

Web‑based collaborative design tool with real‑time editing, component libraries, and interactive prototyping.

#3 Sketch

Mac‑only vector design app focused on UI design, symbols, and prototyping with extensive plugin ecosystem.

Cross‑platform design and prototyping tool from Adobe, offering repeat grids, auto‑animate, and voice prototyping.

#5 Framer

Design‑to‑code platform that combines visual design with React‑based code components for high‑fidelity prototypes.

All‑in‑one design, prototype, and hand‑off solution with advanced animation and collaboration features.

Powerful wireframing and prototyping tool for complex interactions, conditional logic, and data‑driven prototypes.

#8 UXPin

Design system‑focused prototyping platform with interactive states, logic, and code‑component integration.

#9 Marvel

Simple web‑based design, prototype, and user testing suite with hand‑off features for developers.

#10 Proto.io

Browser‑based prototyping tool that lets you create fully interactive mobile and web prototypes without code.

Low‑fidelity wireframing tool focused on rapid sketch‑style UI concepts and quick iteration.

#12 Webflow

Visual web‑design platform that generates clean HTML/CSS/JS, allowing designers to prototype and launch production‑ready sites.

#13 Penpot

Open‑source, web‑based design and prototyping tool that supports SVG editing and collaborative workflows.

Free macOS prototyping app from Facebook, offering advanced interaction design and integration with React components.

Full‑featured prototyping platform for web, mobile, and desktop apps with conditional navigation and data integration.

#16 Fluid UI

Online wireframing and prototyping tool with drag‑and‑drop UI elements and real‑time collaboration.

#17 Mockplus

Rapid prototyping tool that combines design, collaboration, and hand‑off with a large component library.

#18 Zeplin

Design‑to‑development hand‑off platform that syncs designs from Figma, Sketch, or Adobe XD into style guides and specs.

#19 Anima

Plugin for Figma/Sketch/Adobe XD that turns design files into responsive HTML, React, or Vue code.

Animation library for React that can be used alongside prototyping tools to create high‑fidelity interactive demos.

#21 Storybook

Open‑source UI component explorer that lets teams develop, test, and document components in isolation—useful for UI prototyping.